Fuel Delivery Systems

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Regular maintenance to your fuel system includes:

• Using a fuel system additive to clean the system
• Replacing the fuel filter when it is due
• Replacing your air filter when it is required
• Servicing and cleaning the fuel injectors as required.

Common fuel system faults include:

• Poor fuel economy
• Poor throttle response and lack of power
• Stalling problems
• Unable to start the car

Most modern vehicles have an electric fuel pump that delivers a constant flow of fuel to the injectors at a regulated pressure. The fuel pressure regulator maintains fuel pressure in the line. The fuel pump gets a signal from the ECU to run when the ignition key is turned to the start position.

Fuel is delivered to the fuel injector under pressure and fuel is released from the injector into the inlet manifold when it receives a pulse signal from the ECU. The amount of fuel delivered is determined by the length of time of the pulse signal from the ECU. The fuel filter can be mounted in the fuel line between the fuel pump and the injectors or can be part of the fuel sender unit in the fuel tank which often also houses the fuel pump.